scale. Astronomers hold that the solar system has gone through such a process, and Geologists teach that the earth has had its career of evolution. Animals have a mental as well as a physical development, and there is also a progress of knowledge, of religion, of the arts and sciences, of institutions, manners, governments, and civilization itself. Mr. Spencer has the honour of having first established the universality of the principle by which all these changes are governed. The law of evolution, which has been hitherto limited to plants and animals, he demonstrates to be the law of all evolution. This doctrine is unfolded in the first Essay of the present volume, and is more or less fully illustrated in the others; but it will be found elaborately worked out in the second part of First Principles.
The course of the discussion in this part of the work will be best shown by enumerating the titles to the chapters, which are as follows: I. Laws in General; II. The Law of Evolution; III. The Same continued; IV. The Causes of Evolution; V. Space, Time, Matter, Motion, and Force; VI. The Indestructibility of Matter; VII. The Continuity of Motion; VIII. The Persistence of Force; IX. The Correlation and Equivalence of Forces; X. The Direction of Motion; XI. The Rhythm of Motion; XII. The Conditions Essential to Evolution; XIII. The Instability of the Homogeneous; XIV. The Multiplication of Effects; XV. Differentiation and Integration; XVI. Equilibration; XVII. Summary and Conclusion.
A most interesting and fruitful field of thought, it will be seen, is here traversed 7by our author, and the latest and highest questions of science are discussed under novel aspects and in new relations. Not only do the pages abound with acute suggestions and fresh views, but the entire argument, in its leading demonstrations, and the full breadth of its philosophic scope, is stamped with a high originality.
Having thus determined the sphere of philosophy and ascertained those fundamental principles governing all orders of phenomena which are to be subsequently used for guidance and verification, the author proceeds to the second work of the series, which is devoted to Biology, or the Science of Life. He regards life not as a foreign and unintelligible something, thrust into the scheme of nature, of which we can know nothing save its mystery, but as an essential part of the universal plan. The harmonies of life are regarded as but phases of the universal harmony, and Biology is studied by the same methods as other departments of science. The great truths of Physics and Chemistry are applied to its elucidation; its facts are collected, its inductions established, and constantly verified by the first principles laid down at the outset. Apart from its connections with the philosophical system, of which it forms a part, this work will have great intrinsic interest. Nothing was more needed than a compact and well-digested statement of those general principles of life to which science has arrived, and Mr. Spencer's presentation is proving to be just what is required. Some idea of his mode of treating the subject may be formed by glancing over a few of his first chapter-headings. Part First: I. Organic Matter; II. The Actions of Forces on Organic Matter; III. The Reactions of Organic Matter on Forces; IV. Proximate Definition of Life; V. The Correspondence between Life and its Circumstances; VI. The Degree of Life Varies with the Degree of Correspondence; VII. Inductions of Biology. Part Second: I. Growth; II. Development; III. Function; IV. Waste and Repair; V. Adaptation; VI. Individuality; VII. Genesis; VIII. Heredity; IX. Variation; X. Genesis, Heredity and Variation; XI. Classification; XII. Distribution.
In the scheme of nature Mind is ever associated with Life. The third division of this philosophical system will therefore be Psychology, or the Science of Mind. This great subject will be considered, not by the narrow methods usual with metaphysicians, but in its broadest aspects as a phase of nature's order – to be studied by observation and induction through the whole range of psychical manifestation in animated beings. The subject of mind will be regarded in the light of the great truths of Biology previously established; the connections of mind and life will be traced; the progress of mentality as exhibited in the animal grades, and the evolution of the intellectual faculties in man will be delineated and the coöperation of mind and nature in the production of ideas and intelligence unfolded. We have no work upon mind of this comprehensive and thoroughly scientific character: the materials are abundant, and the necessity of their organization is widely recognized. That Mr. Spencer is eminently the man to perform this great task is proved by the fact that he is already the author of the most profound and able contribution to the advancement of psychological science that has appeared for many years.
In the true philosophic order, Biology and Psychology prepare the way for the study of social science, and hence the fourth part of Mr. Spencer's system will treat of Sociology, or the natural laws of society. As a knowledge of individuals must precede an understanding of their mutual relations, so an exposition of the laws of life and mind, which constitute the science of human nature, must precede the successful study of social phenomena. In this part will be considered the development of society, or that intellectual and moral progress which depends upon the growth of human ideas and feelings in their necessary order. The evolution of political, ecclesiastical, and industrial organizations will be traced, and a statement made of those principles underlying all social progress, without which there can be no successful regulation of the affairs of society. Mr. Spencer's mind has long been occupied with these important questions, as the reader will find by referring to his able work upon "Social Statics," published several years ago.
Lastly, in Part Fifth, Mr. Spencer proposes to consider the Principles of Morality, bringing to bear the truths furnished by Biology, Psychology, and Sociology, to determine the true theory of right living. He will show that the true moral ideal and limit of progress is the attainment of an equilibrium between constitution and conditions of existence, and trace those principles of private conduct, physical, intellectual, moral, and religious that follow from the conditions to complete individual life. Those rules of human action which all civilized nations have registered as essential laws – the inductions of morality – will be delineated, and also those mutual limitations of men's actions necessitated by their coexistence as units of society, which constitute the foundation of justice.
It cannot be doubted that the order here indicated, as it corresponds to the method of nature, is the one which Philosophy must pursue in the future. It combines the precision of science with the harmony and unity of universal truth. The time is past when Biology can be considered with no reference to the laws of Physics; Mind with no reference to the science of Life, and Sociology, without having previously mastered the foregoing subjects. The progress of knowledge is now toward more definite, systematic, and comprehensive views, while it is the highest function of intellect to coördinate and bind together its isolated and fragmentary parts. In carrying out his great plan, therefore, Mr. Spencer is but embodying the large philosophical tendencies of the age. If it is urged that his scheme is too vast for any one man to accomplish, it may be replied: 1st. That it is not intended to treat the various subjects exhaustively, but only to state general principles with just sufficient details for their clear illustration. 2d. A considerable portion of the work is already issued, and much more is ready for publication, while the author is still in the prime of life. 3d. It must be remembered that intellects occasionally appear, endowed with that comprehensive grasp and high organizing power which fits them for vast undertakings. The reader will find at the close of the volume Mr. Spencer's Prospectus of his system. That he who has so clearly mapped out his work is the proper one to execute it, we think will be fully apparent to all who peruse the present volume.
An impression prevails with many that Mr. Spencer belongs to the positive school of M. Auguste Comte. This is an entire misapprehension; but the position having been assumed by several of his reviewers, he repels the charge in the following letter, which appeared in the New Englander for January, 1864.
To the Editor of the New Englander:
Sir: – While recognizing the appreciative tone and general candour of the article in your last number, entitled "Herbert Spencer on Ultimate Religious Ideas," allow me to point out one error which pervades it. The writer correctly represents the leading positions of my argument, but he inadvertently conveys a wrong impression respecting my tendencies and sympathies. He says of me, "the spirit of his philosophy is evidently that of the so-called positive method which has now many partial disciples, as well as many zealous adherents among the thinkers of England." Further on I am tacitly classed with "the English admirers and disciples of the great Positivist;" and it is presently added that "in Mr. Spencer we have an example of a positivist, who does not treat